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Addendum & Dedendum Coefficients Face Gears

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badpeanut

Aerospace
Joined
Mar 28, 2005
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I'm working on a design with a face gear of European origin which references an addendum coefficient and a dedendum coefficient. What happens to the face gear when these coefficients are less than 1.0 or greater than 1.0? Is there a resource that explains this in detail?
 
badpeanut,

It's not an ISO or DIN reference, but AGMA 203.02 and 203.03 discuss face gear geometries with a 20deg press angle spur pinion.

Chapter 18 of Litvin's book "Gear Geometry and Applied Theory" also gives a very detailed description of face gear geometries.

Hope that helps.
Terry
 
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